Test for existence of a Ctx buffer by Lua

Test for existence of a Ctx buffer by Lua

[Procházka Lukáš Ing. - Pontex s. r. o.]

Hello,

how to test by Lua whether a Ctx buffer exists?

---
\startbuffer[A]
   Aaa aaa
\stopbuffer

\starttext
   \getbuffer[A]
   Test
   %\getbuffer[NonExisting]
   Vvv
\stoptext
---

To get something like 'context.buffers.A' -> no-nil and 'context.buffers.NonExisting' -> nil?

Best regards,

Lukas


-- 
Ing. Lukáš Procházka [mailto:LPr@pontex.cz]
Pontex s. r. o.      [mailto:pontex@pontex.cz] [http://www.pontex.cz]
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Re: Test for existence of a Ctx buffer by Lua

[Hans Hagen]

On 28-1-2011 3:13, Procházka Lukáš Ing. - Pontex s. r. o. wrote:
> Hello,
>
> how to test by Lua whether a Ctx buffer exists?

\doifelsebuffer

> ---
> \startbuffer[A]
> Aaa aaa
> \stopbuffer
>
> \starttext
> \getbuffer[A]
> Test
> %\getbuffer[NonExisting]
> Vvv
> \stoptext
> ---
>
> To get something like 'context.buffers.A' -> no-nil and
> 'context.buffers.NonExisting' -> nil?
>
> Best regards,
>
> Lukas
>
>


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If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
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